IDENTIFYING CONGESTION ON THE COUNTY ROAD NETWORK A GIS APPROACH

The fist step of congestion management is to identify the congestion. In the county road network level, the corridor congestion often lies in signalized intersections. This paper proposes a methodology that adapts the HCM methodology to county-maintained transportation database and computes the capacity and v/c ratio to a large scale. In other words, the methodology is used in an attempt to evaluate the performance of a large number of intersections simultaneously. Furthermore, the use of GIS software allows the data to be displayed in maps and makes updating of the data a simple task. The paper starts with the discussion of the need for such analysis. Then the detailed methodology is described along with the data requirement. Comparison is made between the proposed method and the method suggested in the Highway Capacity Manual. Cons and Pros of the methodology is outlined. It is found that the proposed method yields comparable results and can be used to display the overall intersection performance in the county road network.

Language

  • English

Media Info

  • Features: Figures; Tables;
  • Pagination: p. 581-585

Subject/Index Terms

Filing Info

  • Accession Number: 00724777
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 21 1996 12:00AM